Re-purpose the zero imu & lidar ports from generating random port value to use current

[Samahu]

Is your feature request related to a problem? Please describe.
Current driver port value defaults use the zero value as to generating and acquiring a random port, which if the user doesn't change these default it would cause the sensor to reinit on every driver restart.

Describe the solution you'd like
Re-purpose the zero imu & lidar ports behavior to attempt to acquire the current port values automatically and if it can't acquire these ports then it would generate new ports.

Describe alternatives you've considered
N/A.

Targeted Platform (please complete the following information only if applicable, otherwise dot N/A):

• Ouster Sensor? ANY
• Ouster Firmware Version? ANY
• ROS version/distro? ROS2 Humble or later
• Operating System? ANY
• Machine Architecture? ANY